Cisco 5520 controller showing as "not connected" on my 6509

[pabene]

I have a 5520 controller with 2 approved 10 gig SFPs.  Port 1 of the controller connects to a 10gig port on a 6509.  Port 2 of 5520 is not connected to anything, but has an SFP in it. The port Te3/5 is set up a trunk and joined to a port channel (channel-group 7 mode on).  No matter what I do, the Te3/5 port shows as "not-connected".  Why would this be???   One thing I notice when doing a sh port on the controller CLI, it has speed at 10 Mbps.  Thats strange, but it recognizes the SFP as 10 gig.  

[johnd2310]

Hi,

Have you tried crossing the fibres on the patch lead?

Thanks

John

[pabene]

Yes I tried that.  And I also have a second 5520 connected to a different 10 gig port on the same 6509.  Same issue.  Cant imagine both fiber cables are bad.  I just don't get it.  I also swapped out the 10 gig GBIC? on the 6509.  But either way ,the switch recognizes the 10 gig module.

[pabene]

On the 5520, from CLI, it shows both of the 10 gig ports as admin enabled.  But for whatever reason, under Mbps it just says "10".  

[pabene]

Index Description Type MTU Speed(Mbps) MAC address
----- --------------------------------------------------- --------------------- ------ ------------ -----------------
1 Unit: 0 Slot: 0 Port: 1 TenGigabit - Level 0x7040001 ethernetCsmacd 1500 10 
2 Unit: 0 Slot: 0 Port: 2 TenGigabit - Level 0x7040001 ethernetCsmacd 1500 10 

See -> Speed "10"

[pabene]

But maybe thats normal. The fact that the switch port shows as " notconnect 1" (1 = native VLAN)

[Leo Laohoo]

What firmware is the controller running on?

[pabene]

8.3.143

[patoberli]

Reboot the WLC with the interfaces inserted. Did you by chance have had a 1 gig SFP in the 5520 before?
I think there once was a bug like this.

[pabene]

I found something in Cisco community that said:


X2-10G-LX4 transceiver to SFP-10G-SR transceiver: These two modules are not compatible with each other.

[patoberli]

Oh, that sounds like a problem.

But first try the reboot of the WLC :)

[pabene]

Yeah, I tried rebooting a couple times. Didn't help.

[patoberli · Accepted solution]

Now I see the problem.

Cisco X2-10GB-LX4 is a multimod fiber at 1300nm wavelength module, while the SFP-10G-SR is an 850nm multimod.



You require Cisco X2-10GB-SR modules for your Catalyst 6500 and MMF fibres, or Cisco SFP-10G-LRM in the 5520 (make sure they're compatible, haven't checked this).

[pabene]

Great, thanks